Originally Posted by TeleMan
Should I be pissed that the dealer used the wrong oil(5W20 instead of 5W30) and oil filter in my2011 F150 Ecoboost motor?
Agree, doubt it did anything. You would not want to run it under heavy loads on hot days for long distance with 5w-20 oil. 1 mile to the house it probably just bearly got to operating temps.
Take it back to the dealer that did it wrong and have them replace it, filter too. How do you really know they actually change it unless you watch. Most have policies that say no customers in service bays due to insurance. You can mark the oil filter some way to be sure they change it.
If intersted below is how the different weights on a multi-weight oil peform:
(such as 10W-30) are a new invention made possible by adding polymers to oil. The polymers allow the oil to have different weights at different temperatures. The first number indicates the viscosity of the oil at a cold temperature, while the second number indicates the viscosity at operating temperature. This from the Sci.Electronics.Repair FAQ offers the following very interesting description of how the polymers work:
- At cold temperatures, the polymers are coiled up and allow the oil to flow as their low numbers indicate. As the oil warms up, the polymers begin to unwind into long chains that prevent the oil from thinning as much as it normally would. The result is that at 100 degrees C, the oil has thinned only as much as the higher viscosity number indicates. Another way of looking at multi-vis oils is to think of a 20W-50 as a 20 weight oil that will not thin more than a 50 weight would when hot.